ISBN: 978-0-13-147572-4, UNIX SHELLS, 4TH ED Actual Exam Questions And Correct Answers.
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What is a special program used as an interface between the user and the heart of the UNIX/Linux operating system, a program called the kernel - correct answer The shell
What are the three prominent and supported shells on most UNIX systems? - correct...
What is a special program used as an interface between the user and the heart of the UNIX/Linux
operating system, a program called the kernel - correct answer The shell
What are the three prominent and supported shells on most UNIX systems? - correct answer
the Bourne shell (AT&T shell), the C Shell (Berkeley shell), and the Korn shell (a superset of the Bourne
shell).
What is ultimately responsible for making sure that any commands typed at the prompt get executed
properly? - correct answer The shell
What is a program in execution and can be identified by its unique PID number? - correct answer
Process
What command with its many options displays a list of the processes currently running in a number of
formats? - correct answer PS
What command displays all processes as a tree with its root being the first process that runs? - correct
answer pstree
What is a request for kernel services and is the only way a process can access the system's hardware -
correct answer System Call
How is a process created in UNIX? - correct answer with the fork system call
A new program can terminate at any time by executing what? - correct answer
exit cell
, A process can be terminated by using keystroke-generated signals like Ctrl-C or Ctrl\, or by using what? -
correct answer the kill command
What command changes permissions on files and directories? - correct answer
chmod
A total of how many bits constitutes the permissions on a file? - correct answer
nine
What command changes the owner and group on files and directories? - correct answer
chown
What command is used to change the working directory? - correct answer cd
The shell can define what two types of variables? - correct answer Local
Environment
What allows processes to communicate with each other? - correct answer A
pipe
There are some characters that are evaluated by the shell in a special way. They are known as what? -
correct answer wildcards
What are descriptive material preceeded by a # sign? They are not executable statements. - correct
answer Comments
To print output to the screen what command is used? - correct answer Echo
What is a list of words separated by whitespace? - correct answer An Array
UNIX/Linux systems come with which two types of user accounts? - correct answer
Regular and Superuser
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